Migrate UsageStats to Spa

The UsageStats page is for testing only, cannot entry through Settings
Home, but is accessible by enter *#*#4636#*#* in dialer.

Migrate UsageStats to Spa for both improving the UI & performance.

Fix: 244675756
Bug: 235727273
Test: Manual with Settings App
Change-Id: I6ec6e233075a3f79ac1231aecafabf2a71dac716

src/com/android/settings/spa/development/UsageStats.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.spa.development
+
+import android.os.Bundle
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.res.stringResource
+import com.android.settings.R
+import com.android.settingslib.spa.framework.common.SettingsPageProvider
+import com.android.settingslib.spa.framework.compose.navigator
+import com.android.settingslib.spa.framework.compose.rememberContext
+import com.android.settingslib.spa.widget.preference.Preference
+import com.android.settingslib.spa.widget.preference.PreferenceModel
+import com.android.settingslib.spaprivileged.template.app.AppListItem
+import com.android.settingslib.spaprivileged.template.app.AppListPage
+
+object UsageStatsPageProvider : SettingsPageProvider {
+    override val name = "UsageStats"
+
+    @Composable
+    override fun Page(arguments: Bundle?) {
+        AppListPage(
+            title = stringResource(R.string.testing_usage_stats),
+            listModel = rememberContext(::UsageStatsListModel),
+            primaryUserOnly = true,
+        ) { itemModel ->
+            AppListItem(itemModel) {}
+        }
+    }
+
+    @Composable
+    fun EntryItem() {
+        Preference(object : PreferenceModel {
+            override val title = stringResource(R.string.testing_usage_stats)
+            override val onClick = navigator(name)
+        })
+    }
+}